Question

Please help!!! we are supposed to write an equation for
thefollowing problem in variables and have no clue what it
is!!

Chapter 10, Problem
86a4

Problem Suppose the spring in the drawing has
aspring constant of k = 30.0 N/m.

(a4) What is the algebraic expression for
thetotal work W done by the spring force when the block
movesfrom an initial position x0 to a final
positionxf? Express your answer in terms
ofx0, xf, and the
springconstant k. Use lowercase only.